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authorBen Gardner <gardner.ben@gmail.com>2009-02-27 14:02:58 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-02-27 16:26:20 -0800
commitdca17146f4b72b8966016c406d94ad3e48289b79 (patch)
tree35ba7c6673cce26f3be599a01a6887e29c952ffd /drivers/w1
parent221be177e68e197a946bb991c8b91468e960be4e (diff)
downloadlinux-dca17146f4b72b8966016c406d94ad3e48289b79.tar.bz2
w1_ds2433: clear the validcrc flag after a write
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>
Diffstat (limited to 'drivers/w1')
-rw-r--r--drivers/w1/slaves/w1_ds2433.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
index 858c16a544c2..139447148822 100644
--- a/drivers/w1/slaves/w1_ds2433.c
+++ b/drivers/w1/slaves/w1_ds2433.c
@@ -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;
}