The patch titled
spi_mpc83xx: hang fix
has been added to the -mm tree. Its filename is
spi_mpc83xx-hang-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: spi_mpc83xx: hang fix
From: Jan Andersson <jan@xxxxxxxxxxx>
When the spi_mpc83xx driver receives a tx_buf pointer which is NULL, it
only writes one zero filled word to the transmit register. If the driver
expects to receive more than one word it will wait forever for a second
receive interrupt. With this patch the controller will shift out zeroes
until all words have been received.
Signed-off-by: Jan Andersson <jan@xxxxxxxxxxx>
Tested-by: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Acked-by: Kumar Gala <galak@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi_mpc83xx.c | 7 ++-----
1 files changed, 2 insertions(+), 5 deletions(-)
diff -puN drivers/spi/spi_mpc83xx.c~spi_mpc83xx-hang-fix drivers/spi/spi_mpc83xx.c
--- a/drivers/spi/spi_mpc83xx.c~spi_mpc83xx-hang-fix
+++ a/drivers/spi/spi_mpc83xx.c
@@ -384,11 +384,8 @@ irqreturn_t mpc83xx_spi_irq(s32 irq, voi
mpc83xx_spi->count -= 1;
if (mpc83xx_spi->count) {
- if (mpc83xx_spi->tx) {
- u32 word = mpc83xx_spi->get_tx(mpc83xx_spi);
- mpc83xx_spi_write_reg(&mpc83xx_spi->base->transmit,
- word);
- }
+ u32 word = mpc83xx_spi->get_tx(mpc83xx_spi);
+ mpc83xx_spi_write_reg(&mpc83xx_spi->base->transmit, word);
} else {
complete(&mpc83xx_spi->done);
}
_
Patches currently in -mm which might be from jan@xxxxxxxxxxx are
spi_mpc83xx-hang-fix.patch
-
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