1175e83f50
It took very little to make the TL-WDR4900 work under 3.19:
- config is the same as for 3.18
- only patch 210 had to be refreshed, the other patches are
the same as for 3.18
- in /etc/config/wireless the path options need to be prefixed
with "platform/" ('platform/ffe09000.pci/...')
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
SVN-Revision: 44517
154 lines
4.7 KiB
Diff
154 lines
4.7 KiB
Diff
From: Gabor Juhos <juhosg@openwrt.org>
|
|
Subject: spi-fsl-espi: avoid frequent high order allocations
|
|
|
|
The driver allocates 64KiB of memory fro a local buffer before
|
|
each transfer and releases that afterwards. When the memory is
|
|
fragmented this allocation often fails and causes a warning like
|
|
this:
|
|
|
|
kworker/u2:2: page allocation failure: order:4, mode:0x10c0d0
|
|
CPU: 0 PID: 7011 Comm: kworker/u2:2 Not tainted 3.10.24 #1
|
|
Workqueue: ffe07000.spi mpc8xxx_spi_work
|
|
Call Trace:
|
|
[c1c6dcf0] [c0006914] show_stack+0x50/0x170 (unreliable)
|
|
[c1c6dd30] [c0259858] dump_stack+0x24/0x34
|
|
[c1c6dd40] [c00672e8] warn_alloc_failed+0x120/0x13c
|
|
[c1c6dd90] [c0069920] __alloc_pages_nodemask+0x574/0x5c8
|
|
[c1c6de20] [c0069990] __get_free_pages+0x1c/0x4c
|
|
[c1c6de30] [c0185174] fsl_espi_do_one_msg+0x128/0x2a0
|
|
[c1c6de90] [c0184290] mpc8xxx_spi_work+0x50/0x7c
|
|
[c1c6dea0] [c0037af8] process_one_work+0x208/0x30c
|
|
[c1c6dec0] [c00387a0] worker_thread+0x20c/0x308
|
|
[c1c6def0] [c003de60] kthread+0xa4/0xa8
|
|
[c1c6df40] [c000c4bc] ret_from_kernel_thread+0x5c/0x64
|
|
|
|
m25p80 spi0.0: error -12 reading SR
|
|
end_request: I/O error, dev mtdblock3, sector 680
|
|
SQUASHFS error: squashfs_read_data failed to read block 0x54a4a
|
|
SQUASHFS error: Unable to read data cache entry [54a4a]
|
|
|
|
Preallocate the buffer from the probe routine to avoid
|
|
this.
|
|
|
|
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
|
|
---
|
|
drivers/spi/spi-fsl-espi.c | 34 ++++++++++++++++------------------
|
|
drivers/spi/spi-fsl-lib.h | 1 +
|
|
2 files changed, 17 insertions(+), 18 deletions(-)
|
|
|
|
diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
|
|
index d0a73a0..f461dde 100644
|
|
--- a/drivers/spi/spi-fsl-espi.c
|
|
+++ b/drivers/spi/spi-fsl-espi.c
|
|
@@ -329,17 +329,13 @@ static void fsl_espi_do_trans(struct spi_message *m,
|
|
static void fsl_espi_cmd_trans(struct spi_message *m,
|
|
struct fsl_espi_transfer *trans, u8 *rx_buff)
|
|
{
|
|
+ struct spi_device *spi = m->spi;
|
|
+ struct mpc8xxx_spi *mspi = spi_master_get_devdata(spi->master);
|
|
struct spi_transfer *t;
|
|
- u8 *local_buf;
|
|
+ u8 *local_buf = mspi->local_buf;
|
|
int i = 0;
|
|
struct fsl_espi_transfer *espi_trans = trans;
|
|
|
|
- local_buf = kzalloc(SPCOM_TRANLEN_MAX, GFP_KERNEL);
|
|
- if (!local_buf) {
|
|
- espi_trans->status = -ENOMEM;
|
|
- return;
|
|
- }
|
|
-
|
|
list_for_each_entry(t, &m->transfers, transfer_list) {
|
|
if (t->tx_buf) {
|
|
memcpy(local_buf + i, t->tx_buf, t->len);
|
|
@@ -352,28 +348,23 @@ static void fsl_espi_cmd_trans(struct spi_message *m,
|
|
fsl_espi_do_trans(m, espi_trans);
|
|
|
|
espi_trans->actual_length = espi_trans->len;
|
|
- kfree(local_buf);
|
|
}
|
|
|
|
static void fsl_espi_rw_trans(struct spi_message *m,
|
|
struct fsl_espi_transfer *trans, u8 *rx_buff)
|
|
{
|
|
+ struct spi_device *spi = m->spi;
|
|
+ struct mpc8xxx_spi *mspi = spi_master_get_devdata(spi->master);
|
|
struct fsl_espi_transfer *espi_trans = trans;
|
|
unsigned int n_tx = espi_trans->n_tx;
|
|
unsigned int n_rx = espi_trans->n_rx;
|
|
struct spi_transfer *t;
|
|
- u8 *local_buf;
|
|
+ u8 *local_buf = mspi->local_buf;
|
|
u8 *rx_buf = rx_buff;
|
|
unsigned int trans_len;
|
|
unsigned int addr;
|
|
int i, pos, loop;
|
|
|
|
- local_buf = kzalloc(SPCOM_TRANLEN_MAX, GFP_KERNEL);
|
|
- if (!local_buf) {
|
|
- espi_trans->status = -ENOMEM;
|
|
- return;
|
|
- }
|
|
-
|
|
for (pos = 0, loop = 0; pos < n_rx; pos += trans_len, loop++) {
|
|
trans_len = n_rx - pos;
|
|
if (trans_len > SPCOM_TRANLEN_MAX - n_tx)
|
|
@@ -407,8 +398,6 @@ static void fsl_espi_rw_trans(struct spi_message *m,
|
|
else
|
|
espi_trans->actual_length += espi_trans->len;
|
|
}
|
|
-
|
|
- kfree(local_buf);
|
|
}
|
|
|
|
static int fsl_espi_do_one_msg(struct spi_master *master,
|
|
@@ -586,6 +575,7 @@ static irqreturn_t fsl_espi_irq(s32 irq, void *context_data)
|
|
static void fsl_espi_remove(struct mpc8xxx_spi *mspi)
|
|
{
|
|
iounmap(mspi->reg_base);
|
|
+ kfree(mspi->local_buf);
|
|
}
|
|
|
|
static int fsl_espi_suspend(struct spi_master *master)
|
|
@@ -652,10 +642,16 @@ static struct spi_master * fsl_espi_probe(struct device *dev,
|
|
mpc8xxx_spi = spi_master_get_devdata(master);
|
|
mpc8xxx_spi->spi_remove = fsl_espi_remove;
|
|
|
|
+ mpc8xxx_spi->local_buf = kzalloc(SPCOM_TRANLEN_MAX, GFP_KERNEL);
|
|
+ if (!mpc8xxx_spi->local_buf) {
|
|
+ ret = -ENOMEM;
|
|
+ goto err_probe;
|
|
+ }
|
|
+
|
|
mpc8xxx_spi->reg_base = ioremap(mem->start, resource_size(mem));
|
|
if (!mpc8xxx_spi->reg_base) {
|
|
ret = -ENOMEM;
|
|
- goto err_probe;
|
|
+ goto free_buf;
|
|
}
|
|
|
|
reg_base = mpc8xxx_spi->reg_base;
|
|
@@ -722,6 +718,8 @@ unreg_master:
|
|
free_irq(mpc8xxx_spi->irq, mpc8xxx_spi);
|
|
free_irq:
|
|
iounmap(mpc8xxx_spi->reg_base);
|
|
+free_buf:
|
|
+ kfree(mpc8xxx_spi->local_buf);
|
|
err_probe:
|
|
spi_master_put(master);
|
|
err:
|
|
diff --git a/drivers/spi/spi-fsl-lib.h b/drivers/spi/spi-fsl-lib.h
|
|
index b4ed04e..3ffa984 100644
|
|
--- a/drivers/spi/spi-fsl-lib.h
|
|
+++ b/drivers/spi/spi-fsl-lib.h
|
|
@@ -30,6 +30,7 @@ struct mpc8xxx_spi {
|
|
void *rx;
|
|
#ifdef CONFIG_SPI_FSL_ESPI
|
|
int len;
|
|
+ u8 *local_buf;
|
|
#endif
|
|
|
|
int subblock;
|
|
--
|
|
2.3.0
|
|
|