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path: root/drivers/scsi/sg.c
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Diffstat (limited to 'drivers/scsi/sg.c')
-rw-r--r--drivers/scsi/sg.c65
1 files changed, 33 insertions, 32 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 0d8afffd1683..b3af9b78fa12 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -285,6 +285,7 @@ sg_open(struct inode *inode, struct file *filp)
int dev = iminor(inode);
int flags = filp->f_flags;
struct request_queue *q;
+ struct scsi_device *device;
Sg_device *sdp;
Sg_fd *sfp;
int retval;
@@ -301,22 +302,19 @@ sg_open(struct inode *inode, struct file *filp)
/* This driver's module count bumped by fops_get in <linux/fs.h> */
/* Prevent the device driver from vanishing while we sleep */
- retval = scsi_device_get(sdp->device);
+ device = sdp->device;
+ retval = scsi_device_get(device);
if (retval)
goto sg_put;
- retval = scsi_autopm_get_device(sdp->device);
- if (retval)
- goto sdp_put;
-
/* scsi_block_when_processing_errors() may block so bypass
* check if O_NONBLOCK. Permits SCSI commands to be issued
* during error recovery. Tread carefully. */
if (!((flags & O_NONBLOCK) ||
- scsi_block_when_processing_errors(sdp->device))) {
+ scsi_block_when_processing_errors(device))) {
retval = -ENXIO;
/* we are in error recovery for this device */
- goto error_out;
+ goto sdp_put;
}
mutex_lock(&sdp->open_rel_lock);
@@ -344,7 +342,7 @@ sg_open(struct inode *inode, struct file *filp)
if (sdp->open_cnt < 1) { /* no existing opens */
sdp->sgdebug = 0;
- q = sdp->device->request_queue;
+ q = device->request_queue;
sdp->sg_tablesize = queue_max_segments(q);
}
sfp = sg_add_sfp(sdp);
@@ -369,11 +367,10 @@ out_undo:
}
error_mutex_locked:
mutex_unlock(&sdp->open_rel_lock);
-error_out:
- scsi_autopm_put_device(sdp->device);
sdp_put:
- scsi_device_put(sdp->device);
- goto sg_put;
+ kref_put(&sdp->d_ref, sg_device_destroy);
+ scsi_device_put(device);
+ return retval;
}
/* Release resources associated with a successful sg_open()
@@ -389,8 +386,6 @@ sg_release(struct inode *inode, struct file *filp)
SCSI_LOG_TIMEOUT(3, sg_printk(KERN_INFO, sdp, "sg_release\n"));
mutex_lock(&sdp->open_rel_lock);
- scsi_autopm_put_device(sdp->device);
- kref_put(&sfp->f_ref, sg_remove_sfp);
sdp->open_cnt--;
/* possibly many open()s waiting on exlude clearing, start many;
@@ -402,6 +397,7 @@ sg_release(struct inode *inode, struct file *filp)
wake_up_interruptible(&sdp->open_wait);
}
mutex_unlock(&sdp->open_rel_lock);
+ kref_put(&sfp->f_ref, sg_remove_sfp);
return 0;
}
@@ -1239,8 +1235,7 @@ sg_vma_fault(struct vm_fault *vmf)
len = vma->vm_end - sa;
len = (len < length) ? len : length;
if (offset < len) {
- struct page *page = nth_page(rsv_schp->pages[k],
- offset >> PAGE_SHIFT);
+ struct page *page = rsv_schp->pages[k] + (offset >> PAGE_SHIFT);
get_page(page); /* increment page count */
vmf->page = page;
return 0; /* success */
@@ -1421,10 +1416,11 @@ static const struct file_operations sg_fops = {
.mmap = sg_mmap,
.release = sg_release,
.fasync = sg_fasync,
- .llseek = no_llseek,
};
-static struct class *sg_sysfs_class;
+static const struct class sg_sysfs_class = {
+ .name = "scsi_generic"
+};
static int sg_sysfs_valid = 0;
@@ -1526,7 +1522,7 @@ sg_add_device(struct device *cl_dev)
if (sg_sysfs_valid) {
struct device *sg_class_member;
- sg_class_member = device_create(sg_sysfs_class, cl_dev->parent,
+ sg_class_member = device_create(&sg_sysfs_class, cl_dev->parent,
MKDEV(SCSI_GENERIC_MAJOR,
sdp->index),
sdp, "%s", sdp->name);
@@ -1616,7 +1612,7 @@ sg_remove_device(struct device *cl_dev)
read_unlock_irqrestore(&sdp->sfd_lock, iflags);
sysfs_remove_link(&scsidp->sdev_gendev.kobj, "generic");
- device_destroy(sg_sysfs_class, MKDEV(SCSI_GENERIC_MAJOR, sdp->index));
+ device_destroy(&sg_sysfs_class, MKDEV(SCSI_GENERIC_MAJOR, sdp->index));
cdev_del(sdp->cdev);
sdp->cdev = NULL;
@@ -1642,7 +1638,7 @@ MODULE_PARM_DESC(allow_dio, "allow direct I/O (default: 0 (disallow))");
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
-static struct ctl_table sg_sysctls[] = {
+static const struct ctl_table sg_sysctls[] = {
{
.procname = "sg-big-buff",
.data = &sg_big_buff,
@@ -1650,7 +1646,6 @@ static struct ctl_table sg_sysctls[] = {
.mode = 0444,
.proc_handler = proc_dointvec,
},
- {}
};
static struct ctl_table_header *hdr;
@@ -1662,8 +1657,7 @@ static void register_sg_sysctls(void)
static void unregister_sg_sysctls(void)
{
- if (hdr)
- unregister_sysctl_table(hdr);
+ unregister_sysctl_table(hdr);
}
#else
#define register_sg_sysctls() do { } while (0)
@@ -1688,11 +1682,9 @@ init_sg(void)
SG_MAX_DEVS, "sg");
if (rc)
return rc;
- sg_sysfs_class = class_create("scsi_generic");
- if ( IS_ERR(sg_sysfs_class) ) {
- rc = PTR_ERR(sg_sysfs_class);
+ rc = class_register(&sg_sysfs_class);
+ if (rc)
goto err_out;
- }
sg_sysfs_valid = 1;
rc = scsi_register_interface(&sg_interface);
if (0 == rc) {
@@ -1701,7 +1693,7 @@ init_sg(void)
#endif /* CONFIG_SCSI_PROC_FS */
return 0;
}
- class_destroy(sg_sysfs_class);
+ class_unregister(&sg_sysfs_class);
register_sg_sysctls();
err_out:
unregister_chrdev_region(MKDEV(SCSI_GENERIC_MAJOR, 0), SG_MAX_DEVS);
@@ -1716,7 +1708,7 @@ exit_sg(void)
remove_proc_subtree("scsi/sg", NULL);
#endif /* CONFIG_SCSI_PROC_FS */
scsi_unregister_interface(&sg_interface);
- class_destroy(sg_sysfs_class);
+ class_unregister(&sg_sysfs_class);
sg_sysfs_valid = 0;
unregister_chrdev_region(MKDEV(SCSI_GENERIC_MAJOR, 0),
SG_MAX_DEVS);
@@ -2208,6 +2200,7 @@ sg_remove_sfp_usercontext(struct work_struct *work)
{
struct sg_fd *sfp = container_of(work, struct sg_fd, ew.work);
struct sg_device *sdp = sfp->parentdp;
+ struct scsi_device *device = sdp->device;
Sg_request *srp;
unsigned long iflags;
@@ -2215,9 +2208,17 @@ sg_remove_sfp_usercontext(struct work_struct *work)
write_lock_irqsave(&sfp->rq_list_lock, iflags);
while (!list_empty(&sfp->rq_list)) {
srp = list_first_entry(&sfp->rq_list, Sg_request, entry);
- sg_finish_rem_req(srp);
list_del(&srp->entry);
+ write_unlock_irqrestore(&sfp->rq_list_lock, iflags);
+
+ sg_finish_rem_req(srp);
+ /*
+ * sg_rq_end_io() uses srp->parentfp. Hence, only clear
+ * srp->parentfp after blk_mq_free_request() has been called.
+ */
srp->parentfp = NULL;
+
+ write_lock_irqsave(&sfp->rq_list_lock, iflags);
}
write_unlock_irqrestore(&sfp->rq_list_lock, iflags);
@@ -2233,8 +2234,8 @@ sg_remove_sfp_usercontext(struct work_struct *work)
"sg_remove_sfp: sfp=0x%p\n", sfp));
kfree(sfp);
- scsi_device_put(sdp->device);
kref_put(&sdp->d_ref, sg_device_destroy);
+ scsi_device_put(device);
module_put(THIS_MODULE);
}
generated by cgit (git 2.34.1) at 2025-12-24 20:31:03 +0000