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w1_ds2433: clear the validcrc flag after a write

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The w1_ds2433 driver does not read from the hardware if the CRC was valid
on the last read.  The validcrc flag should be cleared after a write so
that the new value can be read.

Signed-off-by: Ben Gardner <gardner.ben@gmail.com>
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ben Gardner 2009-02-27 14:02:58 -08:00 committed by Linus Torvalds
parent 221be177e6
commit dca17146f4
1 changed files with 6 additions and 1 deletions
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7
drivers/w1/slaves/w1_ds2433.c
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@ -156,6 +156,9 @@ out_up:
*/
static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
{
#ifdef CONFIG_W1_SLAVE_DS2433_CRC
struct w1_f23_data *f23 = sl->family_data;
#endif
u8 wrbuf[4];
u8 rdbuf[W1_PAGE_SIZE + 3];
u8 es = (addr + len - 1) & 0x1f;
@ -196,7 +199,9 @@ static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
/* Reset the bus to wake up the EEPROM (this may not be needed) */
w1_reset_bus(sl->master);
#ifdef CONFIG_W1_SLAVE_DS2433_CRC
f23->validcrc &= ~(1 << (addr >> W1_PAGE_BITS));
#endif
return 0;
}