staging: wilc1000: linux_wlan_spi.c: fix kzalloc error check

This patch fixes error check of kzalloc.
If kzalloc is failed, return type is used as -ENOMEM.

Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/wilc1000/linux_wlan_spi.c b/drivers/staging/wilc1000/linux_wlan_spi.c
index 3e242564701843479decf95fca6e4c674423bddb..51bbd969e96ba377fb0fc32e3b67f46f2ca4c80f 100644 (file)
--- a/drivers/staging/wilc1000/linux_wlan_spi.c
+++ b/drivers/staging/wilc1000/linux_wlan_spi.c
@@ -125,10 +125,8 @@ int linux_spi_write(u8 *b, u32 len)
                int remainder = len % TXRX_PHASE_SIZE;
 
                char *r_buffer = kzalloc(TXRX_PHASE_SIZE, GFP_KERNEL);
-
-               if (!r_buffer) {
-                       PRINT_ER("Failed to allocate memory for r_buffer\n");
-               }
+               if (!r_buffer)
+                       return -ENOMEM;
 
                if (blk) {
                        while (i < blk) {
@@ -208,10 +206,9 @@ int linux_spi_write(u8 *b, u32 len)
                        .delay_usecs = 0,
                };
                char *r_buffer = kzalloc(len, GFP_KERNEL);
+               if (!r_buffer)
+                       return -ENOMEM;
 
-               if (!r_buffer) {
-                       PRINT_ER("Failed to allocate memory for r_buffer\n");
-               }
                tr.rx_buf = r_buffer;
                PRINT_D(BUS_DBG, "Request writing %d bytes\n", len);
 
@@ -257,10 +254,8 @@ int linux_spi_read(unsigned char *rb, unsigned long rlen)
                int remainder = rlen % TXRX_PHASE_SIZE;
 
                char *t_buffer = kzalloc(TXRX_PHASE_SIZE, GFP_KERNEL);
-
-               if (!t_buffer) {
-                       PRINT_ER("Failed to allocate memory for t_buffer\n");
-               }
+               if (!t_buffer)
+                       return -ENOMEM;
 
                if (blk) {
                        while (i < blk) {
@@ -337,10 +332,9 @@ int linux_spi_read(unsigned char *rb, unsigned long rlen)
 
                };
                char *t_buffer = kzalloc(rlen, GFP_KERNEL);
+               if (!t_buffer)
+                       return -ENOMEM;
 
-               if (!t_buffer) {
-                       PRINT_ER("Failed to allocate memory for t_buffer\n");
-               }
                tr.tx_buf = t_buffer;
 
                memset(&msg, 0, sizeof(msg));