diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0176-spi-bcm2835-fix-overflow-in-calculation-of-transfer-.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0176-spi-bcm2835-fix-overflow-in-calculation-of-transfer-.patch | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0176-spi-bcm2835-fix-overflow-in-calculation-of-transfer-.patch b/target/linux/brcm2708/patches-4.1/0176-spi-bcm2835-fix-overflow-in-calculation-of-transfer-.patch deleted file mode 100644 index 7aa970d276..0000000000 --- a/target/linux/brcm2708/patches-4.1/0176-spi-bcm2835-fix-overflow-in-calculation-of-transfer-.patch +++ /dev/null @@ -1,53 +0,0 @@ -From 3604c2a5b623829c9127d312813f3427531ebfcd Mon Sep 17 00:00:00 2001 -From: Martin Sperl <kernel@martin.sperl.org> -Date: Wed, 29 Jul 2015 07:34:10 +0000 -Subject: [PATCH 176/222] spi: bcm2835: fix overflow in calculation of transfer - time - -This resulted in the use of polling mode when other approaches -(dma or interrupts) would have been more appropriate. - -Happened for transfers longer than 477 bytes. - -Reported-by: Noralf Tronnes <noralf@tronnes.org> -Signed-off-by: Martin Sperl <kernel@martin.sperl.org> -Signed-off-by: Mark Brown <broonie@kernel.org> -(cherry picked from commit 0122a5183088e3117bb9c8fbe248914efb502f3f) ---- - drivers/spi/spi-bcm2835.c | 10 ++++++---- - 1 file changed, 6 insertions(+), 4 deletions(-) - ---- a/drivers/spi/spi-bcm2835.c -+++ b/drivers/spi/spi-bcm2835.c -@@ -480,7 +480,7 @@ static int bcm2835_spi_transfer_one_poll - struct spi_device *spi, - struct spi_transfer *tfr, - u32 cs, -- unsigned long xfer_time_us) -+ unsigned long long xfer_time_us) - { - struct bcm2835_spi *bs = spi_master_get_devdata(master); - unsigned long timeout; -@@ -531,7 +531,8 @@ static int bcm2835_spi_transfer_one(stru - { - struct bcm2835_spi *bs = spi_master_get_devdata(master); - unsigned long spi_hz, clk_hz, cdiv; -- unsigned long spi_used_hz, xfer_time_us; -+ unsigned long spi_used_hz; -+ unsigned long long xfer_time_us; - u32 cs = bcm2835_rd(bs, BCM2835_SPI_CS); - - /* set clock */ -@@ -573,9 +574,10 @@ static int bcm2835_spi_transfer_one(stru - bs->rx_len = tfr->len; - - /* calculate the estimated time in us the transfer runs */ -- xfer_time_us = tfr->len -+ xfer_time_us = (unsigned long long)tfr->len - * 9 /* clocks/byte - SPI-HW waits 1 clock after each byte */ -- * 1000000 / spi_used_hz; -+ * 1000000; -+ do_div(xfer_time_us, spi_used_hz); - - /* for short requests run polling*/ - if (xfer_time_us <= BCM2835_SPI_POLLING_LIMIT_US) |