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>

diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
index 858c16a544c21bc4517c50b853c394e8004373be..1394471488228d2f747475256a3236103a7973f4 100644 (file)
--- 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;
 }