From: Dan Carpenter <dan.carpenter@oracle.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Cc: Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] powerpc/44x: mask and shift to zero bug
Date: Fri, 25 Aug 2017 13:33:40 +0300 [thread overview]
Message-ID: <20170825103340.op3uphrv3eyeutiz@mwanda> (raw)
My static checker complains that 0x00001800 >> 13 is zero. Looking at
the context, it seems like a copy and paste bug from the line below and
probably 0x3 << 13 or 0x00006000 was intended.
Fixes: 2af59f7d5c3e ("[POWERPC] 4xx: Add 405GPr and 405EP support in boot wrapper")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
Not tested!
diff --git a/arch/powerpc/boot/4xx.c b/arch/powerpc/boot/4xx.c
index 9d3bd4c45a24..f7da65169124 100644
--- a/arch/powerpc/boot/4xx.c
+++ b/arch/powerpc/boot/4xx.c
@@ -564,7 +564,7 @@ void ibm405gp_fixup_clocks(unsigned int sys_clk, unsigned int ser_clk)
fbdv = 16;
cbdv = ((pllmr & 0x00060000) >> 17) + 1; /* CPU:PLB */
opdv = ((pllmr & 0x00018000) >> 15) + 1; /* PLB:OPB */
- ppdv = ((pllmr & 0x00001800) >> 13) + 1; /* PLB:PCI */
+ ppdv = ((pllmr & 0x00006000) >> 13) + 1; /* PLB:PCI */
epdv = ((pllmr & 0x00001800) >> 11) + 2; /* PLB:EBC */
udiv = ((cpc0_cr0 & 0x3e) >> 1) + 1;
next reply other threads:[~2017-08-25 10:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-25 10:33 Dan Carpenter [this message]
2017-08-27 4:56 ` [PATCH] powerpc/44x: mask and shift to zero bug Benjamin Herrenschmidt
2017-08-28 7:57 ` Dan Carpenter
2017-08-28 8:36 ` Dan Carpenter
2017-08-28 11:19 ` Michael Ellerman
2017-08-31 11:36 ` Michael Ellerman
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