Merge tag 'drm-fixes-5.4-2019-10-16' of git://people.freedesktop.org/~agd5f/linux...

[linux.git] / drivers / scsi / scsi_logging.c

diff --git a/drivers/scsi/scsi_logging.c b/drivers/scsi/scsi_logging.c
index 39b8cc4574b491fa8fb3bac330b6c78efa34d937..c6ed0b12e8071b0dc02dea0a2b3c4160c6eebadd 100644 (file)
--- a/drivers/scsi/scsi_logging.c
+++ b/drivers/scsi/scsi_logging.c
@@ -15,57 +15,15 @@
 #include <scsi/scsi_eh.h>
 #include <scsi/scsi_dbg.h>
 
-#define SCSI_LOG_SPOOLSIZE 4096
-
-#if (SCSI_LOG_SPOOLSIZE / SCSI_LOG_BUFSIZE) > BITS_PER_LONG
-#warning SCSI logging bitmask too large
-#endif
-
-struct scsi_log_buf {
-       char buffer[SCSI_LOG_SPOOLSIZE];
-       unsigned long map;
-};
-
-static DEFINE_PER_CPU(struct scsi_log_buf, scsi_format_log);
-
 static char *scsi_log_reserve_buffer(size_t *len)
 {
-       struct scsi_log_buf *buf;
-       unsigned long map_bits = sizeof(buf->buffer) / SCSI_LOG_BUFSIZE;
-       unsigned long idx = 0;
-
-       preempt_disable();
-       buf = this_cpu_ptr(&scsi_format_log);
-       idx = find_first_zero_bit(&buf->map, map_bits);
-       if (likely(idx < map_bits)) {
-               while (test_and_set_bit(idx, &buf->map)) {
-                       idx = find_next_zero_bit(&buf->map, map_bits, idx);
-                       if (idx >= map_bits)
-                               break;
-               }
-       }
-       if (WARN_ON(idx >= map_bits)) {
-               preempt_enable();
-               return NULL;
-       }
-       *len = SCSI_LOG_BUFSIZE;
-       return buf->buffer + idx * SCSI_LOG_BUFSIZE;
+       *len = 128;
+       return kmalloc(*len, GFP_ATOMIC);
 }
 
 static void scsi_log_release_buffer(char *bufptr)
 {
-       struct scsi_log_buf *buf;
-       unsigned long idx;
-       int ret;
-
-       buf = this_cpu_ptr(&scsi_format_log);
-       if (bufptr >= buf->buffer &&
-           bufptr < buf->buffer + SCSI_LOG_SPOOLSIZE) {
-               idx = (bufptr - buf->buffer) / SCSI_LOG_BUFSIZE;
-               ret = test_and_clear_bit(idx, &buf->map);
-               WARN_ON(!ret);
-       }
-       preempt_enable();
+       kfree(bufptr);
 }
 
 static inline const char *scmd_name(const struct scsi_cmnd *scmd)