Thanks Stephen for your comments. I have gone through them. Shall incorporate them and repost the patch.
Sorry for late reply as I was on leave for the last week. With Regards Poonam -----Original Message----- From: Stephen Rothwell [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 11, 2007 5:49 AM To: Aggrwal Poonam Cc: [EMAIL PROTECTED]; linux-kernel@vger.kernel.org; [EMAIL PROTECTED]; Gala Kumar; [EMAIL PROTECTED]; Barkowski Michael; Cutler Richard; Kalra Ashish Subject: Re: [PATCH 2/3] arch/ : Platform changes for UCC TDM driver for MPC8323ERDB.Also includes related QE changes. On Mon, 10 Dec 2007 17:39:22 +0530 (IST) Poonam_Aggrwal-b10812 <[EMAIL PROTECTED]> wrote: > > +++ b/arch/powerpc/sysdev/qe_lib/qe.c > @@ -149,22 +149,116 @@ EXPORT_SYMBOL(qe_issue_cmd); > */ > static unsigned int brg_clk = 0; > > -unsigned int get_brg_clk(void) > +u32 get_brg_clk(enum qe_clock brgclk, enum qe_clock *brg_source) > { > - struct device_node *qe; > - if (brg_clk) > - return brg_clk; > + struct device_node *qe, *brg, *clocks; > + enum qe_clock brg_src; > + u32 brg_input_freq = 0; > + u32 brg_num; > + const unsigned int *prop; > > - qe = of_find_node_by_type(NULL, "qe"); > - if (qe) { > + *brg_source = 0; > + > + brg_num = brgclk - QE_BRG1; > + brg = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg"); > + if (brg) { > unsigned int size; > - const u32 *prop = of_get_property(qe, "brg-frequency", &size); > - brg_clk = *prop; > - of_node_put(qe); > - }; > + prop = of_get_property(brg, > + "fsl,brg-sources", &size); > + > + brg_src = *(prop + brg_num); You should probably sanity check that prop is not NULL and points to something large enough. You don't use brg after here, so the "of_node_put(brg)" could go here to save putting it in multiple places later. Also, currently there are paths through the following code that do not do the of_node_put(brg). > + if (brg_src == 0) { > + *brg_source = 0; > + if (brg_clk > 0) { > + of_node_put(brg); > + return brg_clk; > + } > + qe = of_find_node_by_type(NULL, "qe"); > + if (qe) { > + unsigned int size; > + prop = of_get_property > + (qe, "brg-frequency", &size); > + of_node_put(qe); > + of_node_put(brg); > + return *prop; NULL check here (yes, I know that the old code didn't check). > + } > + } else { > + *brg_source = brg_src + QE_CLK1 - 1; > + clocks = of_find_compatible_node(NULL, NULL, > + "fsl,cpm-clocks"); > + prop = of_get_property(clocks, > + "#clock-cells", &size); > + /* > + * clock-cells = 1 only supported right now. > + */ > + if (*prop != 1) Again check for NULL (and possibly size). > + return 0; > + prop = of_get_property(clocks, > + "clock-frequency", &size); > + > + brg_input_freq = *(prop+(brg_src - 1)); And again. > + of_node_put(clocks); > + of_node_put(brg); > + return brg_input_freq; > + } > + } > return brg_clk; > } -- Cheers, Stephen Rothwell [EMAIL PROTECTED] http://www.canb.auug.org.au/~sfr/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
