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path: root/drivers/scsi/scsi_error.c
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Diffstat (limited to 'drivers/scsi/scsi_error.c')
-rw-r--r--drivers/scsi/scsi_error.c90
1 files changed, 13 insertions, 77 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 39ce3aba1dac..fecefa05cb62 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -112,69 +112,8 @@ int scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag)
112} 112}
113 113
114/** 114/**
115 * scsi_add_timer - Start timeout timer for a single scsi command.
116 * @scmd: scsi command that is about to start running.
117 * @timeout: amount of time to allow this command to run.
118 * @complete: timeout function to call if timer isn't canceled.
119 *
120 * Notes:
121 * This should be turned into an inline function. Each scsi command
122 * has its own timer, and as it is added to the queue, we set up the
123 * timer. When the command completes, we cancel the timer.
124 */
125void scsi_add_timer(struct scsi_cmnd *scmd, int timeout,
126 void (*complete)(struct scsi_cmnd *))
127{
128
129 /*
130 * If the clock was already running for this command, then
131 * first delete the timer. The timer handling code gets rather
132 * confused if we don't do this.
133 */
134 if (scmd->eh_timeout.function)
135 del_timer(&scmd->eh_timeout);
136
137 scmd->eh_timeout.data = (unsigned long)scmd;
138 scmd->eh_timeout.expires = jiffies + timeout;
139 scmd->eh_timeout.function = (void (*)(unsigned long)) complete;
140
141 SCSI_LOG_ERROR_RECOVERY(5, printk("%s: scmd: %p, time:"
142 " %d, (%p)\n", __func__,
143 scmd, timeout, complete));
144
145 add_timer(&scmd->eh_timeout);
146}
147
148/**
149 * scsi_delete_timer - Delete/cancel timer for a given function.
150 * @scmd: Cmd that we are canceling timer for
151 *
152 * Notes:
153 * This should be turned into an inline function.
154 *
155 * Return value:
156 * 1 if we were able to detach the timer. 0 if we blew it, and the
157 * timer function has already started to run.
158 */
159int scsi_delete_timer(struct scsi_cmnd *scmd)
160{
161 int rtn;
162
163 rtn = del_timer(&scmd->eh_timeout);
164
165 SCSI_LOG_ERROR_RECOVERY(5, printk("%s: scmd: %p,"
166 " rtn: %d\n", __func__,
167 scmd, rtn));
168
169 scmd->eh_timeout.data = (unsigned long)NULL;
170 scmd->eh_timeout.function = NULL;
171
172 return rtn;
173}
174
175/**
176 * scsi_times_out - Timeout function for normal scsi commands. 115 * scsi_times_out - Timeout function for normal scsi commands.
177 * @scmd: Cmd that is timing out. 116 * @req: request that is timing out.
178 * 117 *
179 * Notes: 118 * Notes:
180 * We do not need to lock this. There is the potential for a race 119 * We do not need to lock this. There is the potential for a race
@@ -182,9 +121,11 @@ int scsi_delete_timer(struct scsi_cmnd *scmd)
182 * normal completion function determines that the timer has already 121 * normal completion function determines that the timer has already
183 * fired, then it mustn't do anything. 122 * fired, then it mustn't do anything.
184 */ 123 */
185void scsi_times_out(struct scsi_cmnd *scmd) 124enum blk_eh_timer_return scsi_times_out(struct request *req)
186{ 125{
187 enum scsi_eh_timer_return (* eh_timed_out)(struct scsi_cmnd *); 126 struct scsi_cmnd *scmd = req->special;
127 enum blk_eh_timer_return (*eh_timed_out)(struct scsi_cmnd *);
128 enum blk_eh_timer_return rtn = BLK_EH_NOT_HANDLED;
188 129
189 scsi_log_completion(scmd, TIMEOUT_ERROR); 130 scsi_log_completion(scmd, TIMEOUT_ERROR);
190 131
@@ -196,22 +137,20 @@ void scsi_times_out(struct scsi_cmnd *scmd)
196 eh_timed_out = NULL; 137 eh_timed_out = NULL;
197 138
198 if (eh_timed_out) 139 if (eh_timed_out)
199 switch (eh_timed_out(scmd)) { 140 rtn = eh_timed_out(scmd);
200 case EH_HANDLED: 141 switch (rtn) {
201 __scsi_done(scmd); 142 case BLK_EH_NOT_HANDLED:
202 return;
203 case EH_RESET_TIMER:
204 scsi_add_timer(scmd, scmd->timeout_per_command,
205 scsi_times_out);
206 return;
207 case EH_NOT_HANDLED:
208 break; 143 break;
144 default:
145 return rtn;
209 } 146 }
210 147
211 if (unlikely(!scsi_eh_scmd_add(scmd, SCSI_EH_CANCEL_CMD))) { 148 if (unlikely(!scsi_eh_scmd_add(scmd, SCSI_EH_CANCEL_CMD))) {
212 scmd->result |= DID_TIME_OUT << 16; 149 scmd->result |= DID_TIME_OUT << 16;
213 __scsi_done(scmd); 150 return BLK_EH_HANDLED;
214 } 151 }
152
153 return BLK_EH_NOT_HANDLED;
215} 154}
216 155
217/** 156/**
@@ -1793,7 +1732,6 @@ scsi_reset_provider(struct scsi_device *dev, int flag)
1793 1732
1794 blk_rq_init(NULL, &req); 1733 blk_rq_init(NULL, &req);
1795 scmd->request = &req; 1734 scmd->request = &req;
1796 memset(&scmd->eh_timeout, 0, sizeof(scmd->eh_timeout));
1797 1735
1798 scmd->cmnd = req.cmd; 1736 scmd->cmnd = req.cmd;
1799 1737
@@ -1804,8 +1742,6 @@ scsi_reset_provider(struct scsi_device *dev, int flag)
1804 1742
1805 scmd->sc_data_direction = DMA_BIDIRECTIONAL; 1743 scmd->sc_data_direction = DMA_BIDIRECTIONAL;
1806 1744
1807 init_timer(&scmd->eh_timeout);
1808
1809 spin_lock_irqsave(shost->host_lock, flags); 1745 spin_lock_irqsave(shost->host_lock, flags);
1810 shost->tmf_in_progress = 1; 1746 shost->tmf_in_progress = 1;
1811 spin_unlock_irqrestore(shost->host_lock, flags); 1747 spin_unlock_irqrestore(shost->host_lock, flags);