Bug in arch/powerpc/sysdev/fsl_gtm.c
From: Jean-Denis Boyer <hidden>
Date: 2011-02-16 15:11:27
Hi. There is a bug in the function gtm_set_ref_timer16. When called, it correctly sets the requested timer, but the other timer that shares the register GTCFR is reset. The parameter 'clear' passed to macro clrsetbits_8 should not be a bitwise complement, since the macro already complements it. Here is a patch that should fix this issue.
--- linux-2.6.35.11/arch/powerpc/sysdev/fsl_gtm.c
+++ linux/arch/powerpc/sysdev/fsl_gtm.c@@ -203,13 +203,10 @@ spin_lock_irqsave(>m->lock, flags); /* - * Properly reset timers: stop, reset, set up prescalers, reference + * Properly set timers: stop, set up prescalers, reference * value and clear event register. */ - clrsetbits_8(tmr->gtcfr, ~(GTCFR_STP(num) | GTCFR_RST(num)), - GTCFR_STP(num) | GTCFR_RST(num)); - - setbits8(tmr->gtcfr, GTCFR_STP(num)); + setbits8(tmr->gtcfr, GTCFR_STP(num) | GTCFR_RST(num)); if (tmr->gtpsr) out_be16(tmr->gtpsr, psr);
Regards, Jean-Denis Boyer, Eng. Media5 Corporation - Mediatrix, M5T, Media5Boss 4229 Garlock Street, Sherbrooke (Québec), J1L 2C8, CANADA (819)829-8749 x5241