On parisc I see this UBSAN warning with a sym53c896:

 UBSAN: Undefined behaviour in ./drivers/scsi/sym53c8xx_2/sym_hipd.c:762:24
 index -1903078336 is out of range for type 'u32 [7]'

Avoid this warning by switching to dev64_ul().

Signed-off-by: Helge Deller <del...@gmx.de>

diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c 
b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index 6b349e3..15ff285a9 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -759,7 +759,7 @@ static int sym_prepare_setting(struct Scsi_Host *shost, 
struct sym_hcb *np, stru
        /*
         * Maximum synchronous period factor supported by the chip.
         */
-       period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
+       period = div64_ul(11 * div_10M[np->clock_divn - 1], 4 * np->clock_khz);
        np->maxsync = period > 2540 ? 254 : period / 10;
 
        /*

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