mac80211: backport brcmfmac fix for sdio sg table alloc crash
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> SVN-Revision: 48781
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Rafał Miłecki
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2 changed files with 118 additions and 0 deletions
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From: Hante Meuleman <meuleman@broadcom.com>
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Date: Tue, 19 Jan 2016 12:39:24 +0100
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Subject: [PATCH] brcmfmac: fix sdio sg table alloc crash
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With commit 7d34b0560567 ("brcmfmac: Move all module parameters to
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one place") a bug was introduced causing a null pointer exception.
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This patch fixes the bug by initializing the sg table till after
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the settings have been initialized.
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Fixes: 7d34b0560567 ("brcmfmac: Move all module parameters to one place")
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Reported-by: Marc Zyngier <marc.zyngier@arm.com>
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Tested-by: Marc Zyngier <marc.zyngier@arm.com>
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Reviewed-by: Arend Van Spriel <arend@broadcom.com>
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Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
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Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
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Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
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Signed-off-by: Arend van Spriel <arend@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
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@@ -879,11 +879,24 @@ int brcmf_sdiod_abort(struct brcmf_sdio_
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return 0;
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}
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-static void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev)
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+void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev)
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{
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+ struct sdio_func *func;
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+ struct mmc_host *host;
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+ uint max_blocks;
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uint nents;
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int err;
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+ func = sdiodev->func[2];
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+ host = func->card->host;
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+ sdiodev->sg_support = host->max_segs > 1;
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+ max_blocks = min_t(uint, host->max_blk_count, 511u);
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+ sdiodev->max_request_size = min_t(uint, host->max_req_size,
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+ max_blocks * func->cur_blksize);
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+ sdiodev->max_segment_count = min_t(uint, host->max_segs,
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+ SG_MAX_SINGLE_ALLOC);
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+ sdiodev->max_segment_size = host->max_seg_size;
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+
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if (!sdiodev->sg_support)
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return;
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@@ -1021,9 +1034,6 @@ static void brcmf_sdiod_host_fixup(struc
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static int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
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{
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- struct sdio_func *func;
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- struct mmc_host *host;
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- uint max_blocks;
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int ret = 0;
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sdiodev->num_funcs = 2;
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@@ -1054,26 +1064,6 @@ static int brcmf_sdiod_probe(struct brcm
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goto out;
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}
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- /*
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- * determine host related variables after brcmf_sdiod_probe()
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- * as func->cur_blksize is properly set and F2 init has been
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- * completed successfully.
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- */
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- func = sdiodev->func[2];
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- host = func->card->host;
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- sdiodev->sg_support = host->max_segs > 1;
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- max_blocks = min_t(uint, host->max_blk_count, 511u);
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- sdiodev->max_request_size = min_t(uint, host->max_req_size,
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- max_blocks * func->cur_blksize);
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- sdiodev->max_segment_count = min_t(uint, host->max_segs,
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- SG_MAX_SINGLE_ALLOC);
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- sdiodev->max_segment_size = host->max_seg_size;
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-
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- /* allocate scatter-gather table. sg support
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- * will be disabled upon allocation failure.
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- */
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- brcmf_sdiod_sgtable_alloc(sdiodev);
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-
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ret = brcmf_sdiod_freezer_attach(sdiodev);
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if (ret)
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goto out;
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@@ -1084,7 +1074,7 @@ static int brcmf_sdiod_probe(struct brcm
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ret = -ENODEV;
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goto out;
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}
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- brcmf_sdiod_host_fixup(host);
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+ brcmf_sdiod_host_fixup(sdiodev->func[2]->card->host);
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out:
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if (ret)
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brcmf_sdiod_remove(sdiodev);
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
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@@ -4114,6 +4114,11 @@ struct brcmf_sdio *brcmf_sdio_probe(stru
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goto fail;
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}
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+ /* allocate scatter-gather table. sg support
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+ * will be disabled upon allocation failure.
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+ */
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+ brcmf_sdiod_sgtable_alloc(bus->sdiodev);
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+
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/* Query the F2 block size, set roundup accordingly */
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bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
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bus->roundup = min(max_roundup, bus->blocksize);
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
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@@ -342,6 +342,7 @@ int brcmf_sdiod_ramrw(struct brcmf_sdio_
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/* Issue an abort to the specified function */
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int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn);
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+void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev);
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void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,
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enum brcmf_sdiod_state state);
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#ifdef CONFIG_PM_SLEEP
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