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authorJiri Slaby <jslaby@suse.cz>2010-10-10 19:26:57 -0400
committerDavid S. Miller <davem@davemloft.net>2010-10-11 14:05:42 -0400
commitec622ab072e95cf96e78ab4d39d4eea874518c80 (patch)
tree8bd6a7a06f8f5c4f830d01b567532ec204d5feae /drivers/atm
parent5518b29f225dbdf47ded02cf229ff8225a2cdf82 (diff)
ATM: iphase, remove sleep-inside-atomic
Stanse found that ia_init_one locks a spinlock and inside of that it calls ia_start which calls: * request_irq * tx_init which does kmalloc(GFP_KERNEL) Both of them can thus sleep and result in a deadlock. I don't see a reason to have a per-device spinlock there which is used only there and inited right before the lock location. So remove it completely. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Chas Williams <chas@cmf.nrl.navy.mil> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/atm')
-rw-r--r--drivers/atm/iphase.c6
-rw-r--r--drivers/atm/iphase.h2
2 files changed, 1 insertions, 7 deletions
diff --git a/drivers/atm/iphase.c b/drivers/atm/iphase.c
index ee9ddeb5341..8cb0347dec2 100644
--- a/drivers/atm/iphase.c
+++ b/drivers/atm/iphase.c
@@ -3156,7 +3156,6 @@ static int __devinit ia_init_one(struct pci_dev *pdev,
3156{ 3156{
3157 struct atm_dev *dev; 3157 struct atm_dev *dev;
3158 IADEV *iadev; 3158 IADEV *iadev;
3159 unsigned long flags;
3160 int ret; 3159 int ret;
3161 3160
3162 iadev = kzalloc(sizeof(*iadev), GFP_KERNEL); 3161 iadev = kzalloc(sizeof(*iadev), GFP_KERNEL);
@@ -3188,19 +3187,14 @@ static int __devinit ia_init_one(struct pci_dev *pdev,
3188 ia_dev[iadev_count] = iadev; 3187 ia_dev[iadev_count] = iadev;
3189 _ia_dev[iadev_count] = dev; 3188 _ia_dev[iadev_count] = dev;
3190 iadev_count++; 3189 iadev_count++;
3191 spin_lock_init(&iadev->misc_lock);
3192 /* First fixes first. I don't want to think about this now. */
3193 spin_lock_irqsave(&iadev->misc_lock, flags);
3194 if (ia_init(dev) || ia_start(dev)) { 3190 if (ia_init(dev) || ia_start(dev)) {
3195 IF_INIT(printk("IA register failed!\n");) 3191 IF_INIT(printk("IA register failed!\n");)
3196 iadev_count--; 3192 iadev_count--;
3197 ia_dev[iadev_count] = NULL; 3193 ia_dev[iadev_count] = NULL;
3198 _ia_dev[iadev_count] = NULL; 3194 _ia_dev[iadev_count] = NULL;
3199 spin_unlock_irqrestore(&iadev->misc_lock, flags);
3200 ret = -EINVAL; 3195 ret = -EINVAL;
3201 goto err_out_deregister_dev; 3196 goto err_out_deregister_dev;
3202 } 3197 }
3203 spin_unlock_irqrestore(&iadev->misc_lock, flags);
3204 IF_EVENT(printk("iadev_count = %d\n", iadev_count);) 3198 IF_EVENT(printk("iadev_count = %d\n", iadev_count);)
3205 3199
3206 iadev->next_board = ia_boards; 3200 iadev->next_board = ia_boards;
diff --git a/drivers/atm/iphase.h b/drivers/atm/iphase.h
index b2cd20f549c..077735e0e04 100644
--- a/drivers/atm/iphase.h
+++ b/drivers/atm/iphase.h
@@ -1022,7 +1022,7 @@ typedef struct iadev_t {
1022 struct dle_q rx_dle_q; 1022 struct dle_q rx_dle_q;
1023 struct free_desc_q *rx_free_desc_qhead; 1023 struct free_desc_q *rx_free_desc_qhead;
1024 struct sk_buff_head rx_dma_q; 1024 struct sk_buff_head rx_dma_q;
1025 spinlock_t rx_lock, misc_lock; 1025 spinlock_t rx_lock;
1026 struct atm_vcc **rx_open; /* list of all open VCs */ 1026 struct atm_vcc **rx_open; /* list of all open VCs */
1027 u16 num_rx_desc, rx_buf_sz, rxing; 1027 u16 num_rx_desc, rx_buf_sz, rxing;
1028 u32 rx_pkt_ram, rx_tmp_cnt; 1028 u32 rx_pkt_ram, rx_tmp_cnt;