staging: rtl8187se: Change panic to warn when RF switch turned off

This driver issues a kernel panic over conditions that do not
justify such drastic action. Change these to log entries with
a stack dump.

This patch fixes the system crash reported in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/674285.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Reported-and-Tested-by: Robie Basik <rb-oss-3@justgohome.co.uk>
Cc: Stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/rtl8187se/r8185b_init.c b/drivers/staging/rtl8187se/r8185b_init.c
index 46000d7..3bdf9b3 100644 (file)
--- a/drivers/staging/rtl8187se/r8185b_init.c
+++ b/drivers/staging/rtl8187se/r8185b_init.c
@@ -264,8 +264,12 @@ HwHSSIThreeWire(
 
                        udelay(10);
                }
-               if (TryCnt == TC_3W_POLL_MAX_TRY_CNT)
-                       panic("HwThreeWire(): CmdReg: %#X RE|WE bits are not clear!!\n", u1bTmp);
+               if (TryCnt == TC_3W_POLL_MAX_TRY_CNT) {
+                       printk(KERN_ERR "rtl8187se: HwThreeWire(): CmdReg:"
+                              " %#X RE|WE bits are not clear!!\n", u1bTmp);
+                       dump_stack();
+                       return 0;
+               }
 
                /* RTL8187S HSSI Read/Write Function */
                u1bTmp = read_nic_byte(dev, RF_SW_CONFIG);
@@ -298,13 +302,23 @@ HwHSSIThreeWire(
                                int idx;
                                int ByteCnt = nDataBufBitCnt / 8;
                                                                /* printk("%d\n",nDataBufBitCnt); */
-                               if ((nDataBufBitCnt % 8) != 0)
-                               panic("HwThreeWire(): nDataBufBitCnt(%d) should be multiple of 8!!!\n",
-                               nDataBufBitCnt);
+                               if ((nDataBufBitCnt % 8) != 0) {
+                                       printk(KERN_ERR "rtl8187se: "
+                                              "HwThreeWire(): nDataBufBitCnt(%d)"
+                                              " should be multiple of 8!!!\n",
+                                              nDataBufBitCnt);
+                                       dump_stack();
+                                       nDataBufBitCnt += 8;
+                                       nDataBufBitCnt &= ~7;
+                               }
 
-                              if (nDataBufBitCnt > 64)
-                               panic("HwThreeWire(): nDataBufBitCnt(%d) should <= 64!!!\n",
-                               nDataBufBitCnt);
+                              if (nDataBufBitCnt > 64) {
+                                       printk(KERN_ERR "rtl8187se: HwThreeWire():"
+                                              " nDataBufBitCnt(%d) should <= 64!!!\n",
+                                              nDataBufBitCnt);
+                                       dump_stack();
+                                       nDataBufBitCnt = 64;
+                               }
 
                                for (idx = 0; idx < ByteCnt; idx++)
                                        write_nic_byte(dev, (SW_3W_DB0+idx), *(pDataBuf+idx));