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spi: spi-bitbang: Fix conversion of spi_bitbang_transfer_one()

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Since commit 2025172e3 (spi/bitbang: Use core message pump), the following
kernel crash is seen:

Unable to handle kernel NULL pointer dereference at virtual address 0000000d
pgd = 80004000
[0000000d] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in:
CPU: 1 PID: 48 Comm: spi32766 Not tainted 3.11.0-rc1+ #4
task: bfa3e580 ti: bfb90000 task.ti: bfb90000
PC is at spi_bitbang_transfer_one+0x50/0x248
LR is at spi_bitbang_transfer_one+0x20/0x248
...

,and also the following build warning:

drivers/spi/spi-bitbang.c: In function 'spi_bitbang_start':
drivers/spi/spi-bitbang.c:436:31: warning: assignment from incompatible pointer type [enabled by default]

In order to fix it, we need to change the first parameter of
spi_bitbang_transfer_one() to 'struct spi_master *master'.

Tested on a mx6qsabrelite by succesfully probing a SPI NOR flash.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Fabio Estevam 2013-07-17 15:49:54 -03:00 committed by Mark Brown
parent 2025172e32
commit d60990d597
1 changed files with 4 additions and 3 deletions
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7
drivers/spi/spi-bitbang.c
View file

@ -270,7 +270,7 @@ static int spi_bitbang_prepare_hardware(struct spi_master *spi)
return 0;
}
static int spi_bitbang_transfer_one(struct spi_device *spi,
static int spi_bitbang_transfer_one(struct spi_master *master,
struct spi_message *m)
{
struct spi_bitbang *bitbang;
@ -280,8 +280,9 @@ static int spi_bitbang_transfer_one(struct spi_device *spi,
unsigned cs_change;
int status;
int do_setup = -1;
struct spi_device *spi = m->spi;
bitbang = spi_master_get_devdata(spi->master);
bitbang = spi_master_get_devdata(master);
/* FIXME this is made-up ... the correct value is known to
* word-at-a-time bitbang code, and presumably chipselect()
@ -372,7 +373,7 @@ static int spi_bitbang_transfer_one(struct spi_device *spi,
ndelay(nsecs);
}
spi_finalize_current_message(spi->master);
spi_finalize_current_message(master);
return status;
}