diff options
| author | Ravikumar Kattekola <rk@ti.com> | 2017-01-30 15:41:58 +0530 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-02-13 13:20:55 +0100 |
| commit | a53210f56d7f3f75d1edc1b3a069ddb87b72a919 (patch) | |
| tree | 3aa9b4fa149865f2bb976534ae6b78423a75c7ad /drivers/mmc/host/omap_hsmmc.c | |
| parent | 8cc9a3e73de1264cb61d8eca4e15310f3b2b9746 (diff) | |
| download | linux-a53210f56d7f3f75d1edc1b3a069ddb87b72a919.tar.bz2 | |
mmc: host: omap_hsmmc: avoid possible overflow of timeout value
Fixes: a45c6cb81647 ("[ARM] 5369/1: omap mmc: Add new omap
hsmmc controller for 2430 and 34xx, v3")
when using really large timeout (up to 4*60*1000 ms for bkops)
there is a possibility of data overflow using
unsigned int so use 64 bit unsigned long long.
Signed-off-by: Ravikumar Kattekola <rk@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/omap_hsmmc.c')
| -rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 51ca3d7c19ca..a58bd653ed8b 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -1469,10 +1469,11 @@ static int omap_hsmmc_setup_dma_transfer(struct omap_hsmmc_host *host, } static void set_data_timeout(struct omap_hsmmc_host *host, - unsigned int timeout_ns, + unsigned long long timeout_ns, unsigned int timeout_clks) { - unsigned int timeout, cycle_ns; + unsigned long long timeout = timeout_ns; + unsigned int cycle_ns; uint32_t reg, clkd, dto = 0; reg = OMAP_HSMMC_READ(host->base, SYSCTL); @@ -1481,7 +1482,7 @@ static void set_data_timeout(struct omap_hsmmc_host *host, clkd = 1; cycle_ns = 1000000000 / (host->clk_rate / clkd); - timeout = timeout_ns / cycle_ns; + do_div(timeout, cycle_ns); timeout += timeout_clks; if (timeout) { while ((timeout & 0x80000000) == 0) { @@ -1527,7 +1528,7 @@ static int omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req) { int ret; - unsigned int timeout; + unsigned long long timeout; host->data = req->data; |