diff options
| author | David Milburn <dmilburn@redhat.com> | 2013-05-23 16:23:45 -0500 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-08-31 09:35:25 +0200 |
| commit | 6f767a3106227c491d3b27c43887b92c0f9287f8 (patch) | |
| tree | e1c4a1ee8b45071ae11b60399fac2e0b6a2d6088 | |
| parent | e19d13637d27df69e2e6ce031d7776f32705ebcd (diff) | |
mtip32xx: dynamically allocate buffer in debugfs functions
commit c8afd0dcbd14e2352258f2e2d359b36d0edd459f upstream.
Dynamically allocate buf to prevent warnings:
drivers/block/mtip32xx/mtip32xx.c: In function ‘mtip_hw_read_device_status’:
drivers/block/mtip32xx/mtip32xx.c:2823: warning: the frame size of 1056 bytes is larger than 1024 bytes
drivers/block/mtip32xx/mtip32xx.c: In function ‘mtip_hw_read_registers’:
drivers/block/mtip32xx/mtip32xx.c:2894: warning: the frame size of 1056 bytes is larger than 1024 bytes
drivers/block/mtip32xx/mtip32xx.c: In function ‘mtip_hw_read_flags’:
drivers/block/mtip32xx/mtip32xx.c:2917: warning: the frame size of 1056 bytes is larger than 1024 bytes
Signed-off-by: David Milburn <dmilburn@redhat.com>
Acked-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 47 |
1 files changed, 37 insertions, 10 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index 560227b817fe..01c7270b5e84 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -2810,34 +2810,51 @@ static ssize_t show_device_status(struct device_driver *drv, char *buf) static ssize_t mtip_hw_read_device_status(struct file *f, char __user *ubuf, size_t len, loff_t *offset) { + struct driver_data *dd = (struct driver_data *)f->private_data; int size = *offset; - char buf[MTIP_DFS_MAX_BUF_SIZE]; + char *buf; + int rv = 0; if (!len || *offset) return 0; + buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); + if (!buf) { + dev_err(&dd->pdev->dev, + "Memory allocation: status buffer\n"); + return -ENOMEM; + } + size += show_device_status(NULL, buf); *offset = size <= len ? size : len; size = copy_to_user(ubuf, buf, *offset); if (size) - return -EFAULT; + rv = -EFAULT; - return *offset; + kfree(buf); + return rv ? rv : *offset; } static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf, size_t len, loff_t *offset) { struct driver_data *dd = (struct driver_data *)f->private_data; - char buf[MTIP_DFS_MAX_BUF_SIZE]; + char *buf; u32 group_allocated; int size = *offset; - int n; + int n, rv = 0; if (!len || size) return 0; + buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); + if (!buf) { + dev_err(&dd->pdev->dev, + "Memory allocation: register buffer\n"); + return -ENOMEM; + } + size += sprintf(&buf[size], "H/ S ACTive : [ 0x"); for (n = dd->slot_groups-1; n >= 0; n--) @@ -2892,21 +2909,30 @@ static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf, *offset = size <= len ? size : len; size = copy_to_user(ubuf, buf, *offset); if (size) - return -EFAULT; + rv = -EFAULT; - return *offset; + kfree(buf); + return rv ? rv : *offset; } static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf, size_t len, loff_t *offset) { struct driver_data *dd = (struct driver_data *)f->private_data; - char buf[MTIP_DFS_MAX_BUF_SIZE]; + char *buf; int size = *offset; + int rv = 0; if (!len || size) return 0; + buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); + if (!buf) { + dev_err(&dd->pdev->dev, + "Memory allocation: flag buffer\n"); + return -ENOMEM; + } + size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n", dd->port->flags); size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n", @@ -2915,9 +2941,10 @@ static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf, *offset = size <= len ? size : len; size = copy_to_user(ubuf, buf, *offset); if (size) - return -EFAULT; + rv = -EFAULT; - return *offset; + kfree(buf); + return rv ? rv : *offset; } static const struct file_operations mtip_device_status_fops = { |