tree: git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git next
head: 80a2a5a7745b1f65198fb11da9a8d1d38c3003d5
commit: 80a2a5a7745b1f65198fb11da9a8d1d38c3003d5 [84/84] mmc: dw_mmc: Cleanup the DTO timer like the CTO one
reproduce:
# apt-get install sparse
git checkout 80a2a5a7745b1f65198fb11da9a8d1d38c3003d5
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
vim +1953 drivers/mmc/host/dw_mmc.c
1935
1936 static void dw_mci_set_drto(struct dw_mci *host)
1937 {
1938 unsigned int drto_clks;
1939 unsigned int drto_div;
1940 unsigned int drto_ms;
1941 unsigned int irqflags;
1942
1943 drto_clks = mci_readl(host, TMOUT) >> 8;
1944 drto_div = (mci_readl(host, CLKDIV) & 0xff) * 2;
1945 if (drto_div == 0)
1946 drto_div = 1;
1947 drto_ms = DIV_ROUND_UP(MSEC_PER_SEC * drto_clks * drto_div,
1948 host->bus_hz);
1949
1950 /* add a bit spare time */
1951 drto_ms += 10;
1952
> 1953 spin_lock_irqsave(&host->irq_lock, irqflags);
1954 if (!test_bit(EVENT_DATA_COMPLETE, &host->pending_events))
1955 mod_timer(&host->dto_timer,
1956 jiffies + msecs_to_jiffies(drto_ms));
1957 spin_unlock_irqrestore(&host->irq_lock, irqflags);
1958 }
1959
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