lmc: copy_*_user under spinlock

Not sure anyone uses this driver any more, maybe we should just drop it ?
Code is still foul but at least a fraction less broken.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/net/wan/lmc/lmc_main.c b/drivers/net/wan/lmc/lmc_main.c
index f80640f..d7bb63e 100644 (file)
--- a/drivers/net/wan/lmc/lmc_main.c
+++ b/drivers/net/wan/lmc/lmc_main.c
@@ -122,7 +122,6 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
      * Most functions mess with the structure
      * Disable interrupts while we do the polling
      */
-    spin_lock_irqsave(&sc->lmc_lock, flags);
 
     switch (cmd) {
         /*
@@ -152,6 +151,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                break;
        }
 
+       spin_lock_irqsave(&sc->lmc_lock, flags);
         sc->lmc_media->set_status (sc, &ctl);
 
         if(ctl.crc_length != sc->ictl.crc_length) {
@@ -161,6 +161,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
            else
                sc->TxDescriptControlInit &= ~LMC_TDES_ADD_CRC_DISABLE;
         }
+       spin_unlock_irqrestore(&sc->lmc_lock, flags);
 
         ret = 0;
         break;
@@ -187,15 +188,18 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                break;                          /* no change */
             }
             
+           spin_lock_irqsave(&sc->lmc_lock, flags);
             lmc_proto_close(sc);
 
             sc->if_type = new_type;
             lmc_proto_attach(sc);
            ret = lmc_proto_open(sc);
+           spin_unlock_irqrestore(&sc->lmc_lock, flags);
            break;
        }
 
     case LMCIOCGETXINFO: /*fold01*/
+       spin_lock_irqsave(&sc->lmc_lock, flags);
         sc->lmc_xinfo.Magic0 = 0xBEEFCAFE;
 
         sc->lmc_xinfo.PciCardType = sc->lmc_cardtype;
@@ -208,6 +212,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
         sc->lmc_xinfo.MaxFrameSize = LMC_PKT_BUF_SZ;
         sc->lmc_xinfo.link_status = sc->lmc_media->get_link_status (sc);
         sc->lmc_xinfo.mii_reg16 = lmc_mii_readreg (sc, 0, 16);
+       spin_unlock_irqrestore(&sc->lmc_lock, flags);
 
         sc->lmc_xinfo.Magic1 = 0xDEADBEEF;
 
@@ -220,6 +225,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
         break;
 
     case LMCIOCGETLMCSTATS:
+           spin_lock_irqsave(&sc->lmc_lock, flags);
            if (sc->lmc_cardtype == LMC_CARDTYPE_T1) {
                    lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_LSB);
                    sc->extra_stats.framingBitErrorCount +=
@@ -243,6 +249,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                    sc->extra_stats.severelyErroredFrameCount +=
                            regVal & T1FRAMER_SEF_MASK;
            }
+           spin_unlock_irqrestore(&sc->lmc_lock, flags);
            if (copy_to_user(ifr->ifr_data, &sc->lmc_device->stats,
                             sizeof(sc->lmc_device->stats)) ||
                copy_to_user(ifr->ifr_data + sizeof(sc->lmc_device->stats),
@@ -258,12 +265,14 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                    break;
            }
 
+           spin_lock_irqsave(&sc->lmc_lock, flags);
            memset(&sc->lmc_device->stats, 0, sizeof(sc->lmc_device->stats));
            memset(&sc->extra_stats, 0, sizeof(sc->extra_stats));
            sc->extra_stats.check = STATCHECK;
            sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
                    sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
            sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
+           spin_unlock_irqrestore(&sc->lmc_lock, flags);
            ret = 0;
            break;
 
@@ -282,8 +291,10 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                ret = -EFAULT;
                break;
        }
+       spin_lock_irqsave(&sc->lmc_lock, flags);
         sc->lmc_media->set_circuit_type(sc, ctl.circuit_type);
         sc->ictl.circuit_type = ctl.circuit_type;
+       spin_unlock_irqrestore(&sc->lmc_lock, flags);
         ret = 0;
 
         break;
@@ -294,12 +305,14 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
             break;
         }
 
+       spin_lock_irqsave(&sc->lmc_lock, flags);
         /* Reset driver and bring back to current state */
         printk (" REG16 before reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
         lmc_running_reset (dev);
         printk (" REG16 after reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
 
         LMC_EVENT_LOG(LMC_EVENT_FORCEDRESET, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
+       spin_unlock_irqrestore(&sc->lmc_lock, flags);
 
         ret = 0;
         break;
@@ -338,14 +351,15 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
              */
             netif_stop_queue(dev);
 
-       if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) {
+           if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) {
                ret = -EFAULT;
                break;
-       }
+           }
             switch(xc.command){
             case lmc_xilinx_reset: /*fold02*/
                 {
                     u16 mii;
+                   spin_lock_irqsave(&sc->lmc_lock, flags);
                     mii = lmc_mii_readreg (sc, 0, 16);
 
                     /*
@@ -404,6 +418,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                             lmc_led_off(sc, LMC_DS3_LED2);
                         }
                     }
+                   spin_unlock_irqrestore(&sc->lmc_lock, flags);
                     
                     
 
@@ -416,6 +431,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                 {
                     u16 mii;
                     int timeout = 500000;
+                   spin_lock_irqsave(&sc->lmc_lock, flags);
                     mii = lmc_mii_readreg (sc, 0, 16);
 
                     /*
@@ -451,13 +467,14 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                      */
                     while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
                            (timeout-- > 0))
-                        ;
+                        cpu_relax();
 
 
                     /*
                      * stop driving Xilinx-related signals
                      */
                     lmc_gpio_mkinput(sc, 0xff);
+                   spin_unlock_irqrestore(&sc->lmc_lock, flags);
 
                     ret = 0x0;
                     
@@ -493,6 +510,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
 
                     printk("%s: Starting load of data Len: %d at 0x%p == 0x%p\n", dev->name, xc.len, xc.data, data);
 
+                   spin_lock_irqsave(&sc->lmc_lock, flags);
                     lmc_gpio_mkinput(sc, 0xff);
 
                     /*
@@ -545,7 +563,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                      */
                     while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
                            (timeout-- > 0))
-                        ;
+                        cpu_relax();
 
                     printk(KERN_DEBUG "%s: Waited %d for the Xilinx to clear it's memory\n", dev->name, 500000-timeout);
 
@@ -588,6 +606,7 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
 
                     sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
                     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
+                   spin_unlock_irqrestore(&sc->lmc_lock, flags);
 
                     kfree(data);
                     
@@ -611,8 +630,6 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
         break;
     }
 
-    spin_unlock_irqrestore(&sc->lmc_lock, flags); /*fold01*/
-
     lmc_trace(dev, "lmc_ioctl out");
 
     return ret;