drivers/mtd/spi/eeprom_m95xxx.c: add missing error checking

Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com>
14 years ago · f852a0c3bf
parent 74b86d2d51
commit f852a0c3bf
1 changed files with 6 additions and 0 deletions
--- a/drivers/mtd/spi/eeprom_m95xxx.c
+++ b/drivers/mtd/spi/eeprom_m95xxx.c
@ -44,6 +44,9 @@ ssize_t spi_read (uchar *addr, int alen, uchar *buffer, int len)

 	slave = spi_setup_slave(CONFIG_DEFAULT_SPI_BUS, 1, 1000000,
 			CONFIG_DEFAULT_SPI_MODE);
+	if(!slave)
+		return 0;
+
 	spi_claim_bus(slave);

 	/* command */
@ -75,6 +78,9 @@ ssize_t spi_write (uchar *addr, int alen, uchar *buffer, int len)

 	slave = spi_setup_slave(CONFIG_DEFAULT_SPI_BUS, 1, 1000000,
 			CONFIG_DEFAULT_SPI_MODE);
+	if (!slave)
+		return 0;
+
 	spi_claim_bus(slave);

 	buf[0] = SPI_EEPROM_WREN;