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| author | David Milburn <dmilburn@redhat.com> | 2013-05-24 01:23:45 +0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-11-08 20:10:28 +0400 |
| commit | c8afd0dcbd14e2352258f2e2d359b36d0edd459f (patch) | |
| tree | d65bcd976eb1d9e8020ceb894c46f21c9eadd501 /drivers/block | |
| parent | 8f8b899563f28ef26e381a6eb90d12dead77389f (diff) | |
| download | linux-c8afd0dcbd14e2352258f2e2d359b36d0edd459f.tar.xz | |
mtip32xx: dynamically allocate buffer in debugfs functions
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>
Diffstat (limited to 'drivers/block')
| -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 76f3bc4f0c21..050c71267f14 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -2809,34 +2809,51 @@ 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--) @@ -2891,21 +2908,30 @@ 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", @@ -2914,9 +2940,10 @@ 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 = { |