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Date: Tue, 23 Jan 2018 11:55:38 +0100
From: Johannes Thumshirn <jthumshirn@...e.de>
To: Jens Axboe <axboe@...com>
Cc: Linux Block Layer Mailinglist <linux-block@...r.kernel.org>,
Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
Johannes Thumshirn <jthumshirn@...e.de>,
Joe Perches <joe@...ches.com>,
Bart Van Assche <Bart.VanAssche@....com>
Subject: [PATCH v2] bsg: use pr_debug instead of hand craftet macros
Use pr_debug instead of hand craftet macros. This way it is not needed to
re-compile the kernel to enable bsg debug outputs and it's possible to
selectively enable specific prints.
Signed-off-by: Johannes Thumshirn <jthumshirn@...e.de>
Cc: Joe Perches <joe@...ches.com>
Cc: Bart Van Assche <Bart.VanAssche@....com>
---
Changes to v1:
* Aligned arguments (Bart)
* Include bd->name in macro (Joe)
---
block/bsg.c | 40 +++++++++++++++++-----------------------
1 file changed, 17 insertions(+), 23 deletions(-)
diff --git a/block/bsg.c b/block/bsg.c
index 452f94f1c5d4..a1bcbb6ba50b 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -32,6 +32,9 @@
#define BSG_DESCRIPTION "Block layer SCSI generic (bsg) driver"
#define BSG_VERSION "0.4"
+#define bsg_dbg(bd, fmt, ...) \
+ pr_debug("%s: " fmt, (bd)->name, ##__VA_ARGS__)
+
struct bsg_device {
struct request_queue *queue;
spinlock_t lock;
@@ -55,14 +58,6 @@ enum {
#define BSG_DEFAULT_CMDS 64
#define BSG_MAX_DEVS 32768
-#undef BSG_DEBUG
-
-#ifdef BSG_DEBUG
-#define dprintk(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ##args)
-#else
-#define dprintk(fmt, args...)
-#endif
-
static DEFINE_MUTEX(bsg_mutex);
static DEFINE_IDR(bsg_minor_idr);
@@ -123,7 +118,7 @@ static struct bsg_command *bsg_alloc_command(struct bsg_device *bd)
bc->bd = bd;
INIT_LIST_HEAD(&bc->list);
- dprintk("%s: returning free cmd %p\n", bd->name, bc);
+ bsg_dbg(bd, "returning free cmd %p\n", bc);
return bc;
out:
spin_unlock_irq(&bd->lock);
@@ -222,7 +217,8 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t mode)
if (!bcd->class_dev)
return ERR_PTR(-ENXIO);
- dprintk("map hdr %llx/%u %llx/%u\n", (unsigned long long) hdr->dout_xferp,
+ bsg_dbg(bd, "map hdr %llx/%u %llx/%u\n",
+ (unsigned long long) hdr->dout_xferp,
hdr->dout_xfer_len, (unsigned long long) hdr->din_xferp,
hdr->din_xfer_len);
@@ -299,8 +295,8 @@ static void bsg_rq_end_io(struct request *rq, blk_status_t status)
struct bsg_device *bd = bc->bd;
unsigned long flags;
- dprintk("%s: finished rq %p bc %p, bio %p\n",
- bd->name, rq, bc, bc->bio);
+ bsg_dbg(bd, "finished rq %p bc %p, bio %p\n",
+ rq, bc, bc->bio);
bc->hdr.duration = jiffies_to_msecs(jiffies - bc->hdr.duration);
@@ -333,7 +329,7 @@ static void bsg_add_command(struct bsg_device *bd, struct request_queue *q,
list_add_tail(&bc->list, &bd->busy_list);
spin_unlock_irq(&bd->lock);
- dprintk("%s: queueing rq %p, bc %p\n", bd->name, rq, bc);
+ bsg_dbg(bd, "queueing rq %p, bc %p\n", rq, bc);
rq->end_io_data = bc;
blk_execute_rq_nowait(q, NULL, rq, at_head, bsg_rq_end_io);
@@ -379,7 +375,7 @@ static struct bsg_command *bsg_get_done_cmd(struct bsg_device *bd)
}
} while (1);
- dprintk("%s: returning done %p\n", bd->name, bc);
+ bsg_dbg(bd, "returning done %p\n", bc);
return bc;
}
@@ -390,7 +386,7 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
struct scsi_request *req = scsi_req(rq);
int ret = 0;
- dprintk("rq %p bio %p 0x%x\n", rq, bio, req->result);
+ pr_debug("rq %p bio %p 0x%x\n", rq, bio, req->result);
/*
* fill in all the output members
*/
@@ -469,7 +465,7 @@ static int bsg_complete_all_commands(struct bsg_device *bd)
struct bsg_command *bc;
int ret, tret;
- dprintk("%s: entered\n", bd->name);
+ bsg_dbg(bd, "entered\n");
/*
* wait for all commands to complete
@@ -572,7 +568,7 @@ bsg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
int ret;
ssize_t bytes_read;
- dprintk("%s: read %zd bytes\n", bd->name, count);
+ bsg_dbg(bd, "read %zd bytes\n", count);
bsg_set_block(bd, file);
@@ -646,7 +642,7 @@ bsg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
ssize_t bytes_written;
int ret;
- dprintk("%s: write %zd bytes\n", bd->name, count);
+ bsg_dbg(bd, "write %zd bytes\n", count);
if (unlikely(uaccess_kernel()))
return -EINVAL;
@@ -664,7 +660,7 @@ bsg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
if (!bytes_written || err_block_err(ret))
bytes_written = ret;
- dprintk("%s: returning %zd\n", bd->name, bytes_written);
+ bsg_dbg(bd, "returning %zd\n", bytes_written);
return bytes_written;
}
@@ -717,7 +713,7 @@ static int bsg_put_device(struct bsg_device *bd)
hlist_del(&bd->dev_list);
mutex_unlock(&bsg_mutex);
- dprintk("%s: tearing down\n", bd->name);
+ bsg_dbg(bd, "tearing down\n");
/*
* close can always block
@@ -744,9 +740,7 @@ static struct bsg_device *bsg_add_device(struct inode *inode,
struct file *file)
{
struct bsg_device *bd;
-#ifdef BSG_DEBUG
unsigned char buf[32];
-#endif
if (!blk_queue_scsi_passthrough(rq)) {
WARN_ONCE(true, "Attempt to register a non-SCSI queue\n");
@@ -771,7 +765,7 @@ static struct bsg_device *bsg_add_device(struct inode *inode,
hlist_add_head(&bd->dev_list, bsg_dev_idx_hash(iminor(inode)));
strncpy(bd->name, dev_name(rq->bsg_dev.class_dev), sizeof(bd->name) - 1);
- dprintk("bound to <%s>, max queue %d\n",
+ bsg_dbg(bd, "bound to <%s>, max queue %d\n",
format_dev_t(buf, inode->i_rdev), bd->max_queue);
mutex_unlock(&bsg_mutex);
--
2.13.6
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