gcc-6 and higher warn about the way some loops are written in the ncr5380 driver:
drivers/scsi/g_NCR5380.c: In function 'generic_NCR5380_pread': drivers/scsi/g_NCR5380.c:541:3: error: this 'while' clause does not guard... [-Werror=misleading-indentation] while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY); ^~~~~ drivers/scsi/g_NCR5380.c:544:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
This was addressed in mainline kernels as part of a rework on commit 12150797d064 ("ncr5380: Use runtime register mapping"). We don't want the entire patch backported to stable kernels, but we can backport one hunk to get rid of the warning.
Signed-off-by: Arnd Bergmann arnd@arndb.de --- drivers/scsi/g_NCR5380.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c index f8d2478b11cc..87e081f8a386 100644 --- a/drivers/scsi/g_NCR5380.c +++ b/drivers/scsi/g_NCR5380.c @@ -538,7 +538,10 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks); return -1; } - while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY); + while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY) + { + // FIXME - no timeout + }
#ifndef SCSI_G_NCR5380_MEM {