diff options
Diffstat (limited to 'drivers/scsi/qedf/qedf_debugfs.c')
| -rw-r--r-- | drivers/scsi/qedf/qedf_debugfs.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/drivers/scsi/qedf/qedf_debugfs.c b/drivers/scsi/qedf/qedf_debugfs.c index a3ed681c8ce3..451fd236bfd0 100644 --- a/drivers/scsi/qedf/qedf_debugfs.c +++ b/drivers/scsi/qedf/qedf_debugfs.c @@ -8,6 +8,7 @@ #include <linux/uaccess.h> #include <linux/debugfs.h> #include <linux/module.h> +#include <linux/vmalloc.h> #include "qedf.h" #include "qedf_dbg.h" @@ -98,7 +99,9 @@ static ssize_t qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count, loff_t *ppos) { + ssize_t ret; size_t cnt = 0; + char *cbuf; int id; struct qedf_fastpath *fp = NULL; struct qedf_dbg_ctx *qedf_dbg = @@ -108,19 +111,25 @@ qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count, QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); - cnt = sprintf(buffer, "\nFastpath I/O completions\n\n"); + cbuf = vmalloc(QEDF_DEBUGFS_LOG_LEN); + if (!cbuf) + return 0; + + cnt += scnprintf(cbuf + cnt, QEDF_DEBUGFS_LOG_LEN - cnt, "\nFastpath I/O completions\n\n"); for (id = 0; id < qedf->num_queues; id++) { fp = &(qedf->fp_array[id]); if (fp->sb_id == QEDF_SB_ID_NULL) continue; - cnt += sprintf((buffer + cnt), "#%d: %lu\n", id, - fp->completions); + cnt += scnprintf(cbuf + cnt, QEDF_DEBUGFS_LOG_LEN - cnt, + "#%d: %lu\n", id, fp->completions); } - cnt = min_t(int, count, cnt - *ppos); - *ppos += cnt; - return cnt; + ret = simple_read_from_buffer(buffer, count, ppos, cbuf, cnt); + + vfree(cbuf); + + return ret; } static ssize_t @@ -138,15 +147,14 @@ qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count, loff_t *ppos) { int cnt; + char cbuf[32]; struct qedf_dbg_ctx *qedf_dbg = (struct qedf_dbg_ctx *)filp->private_data; QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "debug mask=0x%x\n", qedf_debug); - cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug); + cnt = scnprintf(cbuf, sizeof(cbuf), "debug mask = 0x%x\n", qedf_debug); - cnt = min_t(int, count, cnt - *ppos); - *ppos += cnt; - return cnt; + return simple_read_from_buffer(buffer, count, ppos, cbuf, cnt); } static ssize_t @@ -185,18 +193,17 @@ qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer, size_t count, loff_t *ppos) { int cnt; + char cbuf[7]; struct qedf_dbg_ctx *qedf_dbg = (struct qedf_dbg_ctx *)filp->private_data; struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, dbg_ctx); QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); - cnt = sprintf(buffer, "%s\n", + cnt = scnprintf(cbuf, sizeof(cbuf), "%s\n", qedf->stop_io_on_error ? "true" : "false"); - cnt = min_t(int, count, cnt - *ppos); - *ppos += cnt; - return cnt; + return simple_read_from_buffer(buffer, count, ppos, cbuf, cnt); } static ssize_t |