Messages in this thread | | | From | "TK, Pratheesh Gangadhar" <> | Date | Thu, 24 Feb 2011 19:26:28 +0530 | Subject | RE: [PATCH v3 1/2] PRUSS UIO driver support |
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> -----Original Message----- > From: Hans J. Koch [mailto:hjk@hansjkoch.de] > Sent: Wednesday, February 23, 2011 11:07 PM > To: TK, Pratheesh Gangadhar > Cc: davinci-linux-open-source@linux.davincidsp.com; hjk@hansjkoch.de; > gregkh@suse.de; Chatterjee, Amit; linux-kernel@vger.kernel.org; linux-arm- > kernel@lists.infradead.org > Subject: Re: [PATCH v3 1/2] PRUSS UIO driver support > > On Wed, Feb 23, 2011 at 07:22:40PM +0530, Pratheesh Gangadhar wrote: > > This patch implements PRUSS (Programmable Real-time Unit Sub System) > > UIO driver which exports SOC resources associated with PRUSS like > > I/O, memories and IRQs to user space. PRUSS is dual 32-bit RISC > > processors which is efficient in performing embedded tasks that > > require manipulation of packed memory mapped data structures and > > efficient in handling system events that have tight real time > > constraints. This driver is currently supported on Texas Instruments > > DA850, AM18xx and OMAPL1-38 devices. > > For example, PRUSS runs firmware for real-time critical industrial > > communication data link layer and communicates with application stack > > running in user space via shared memory and IRQs. > > > > Signed-off-by: Pratheesh Gangadhar <pratheesh@ti.com> > > --- > > drivers/uio/Kconfig | 17 ++++ > > drivers/uio/Makefile | 1 + > > drivers/uio/uio_pruss.c | 223 > +++++++++++++++++++++++++++++++++++++++++++++++ > > 3 files changed, 241 insertions(+), 0 deletions(-) > > create mode 100644 drivers/uio/uio_pruss.c > > > > [...] > > > + > > +static int __devinit pruss_probe(struct platform_device *dev) > > +{ > > + int ret = -ENODEV, count = 0; > > + struct resource *regs_prussio, *regs_l3ram, *regs_ddr; > > + struct uio_info *p; > > + > > + info = kzalloc(sizeof(struct uio_info) * MAX_PRUSS_EVTOUT_INSTANCE, > > + GFP_KERNEL); > > + if (!info) > > + return -ENOMEM; > > + > > + /* Power on PRU in case its not done as part of boot-loader */ > > + pruss_clk = clk_get(&dev->dev, "pruss"); > > + if (IS_ERR(pruss_clk)) { > > + dev_err(&dev->dev, "Failed to get clock\n"); > > + ret = PTR_ERR(pruss_clk); > > + return ret; > > You leak memory here. What about freeing "info"?
Ok. Will fix.
Thanks, Pratheesh
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