Commit ab029631 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'spi-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi 

Pull spi fixes from Mark Brown:
 "A few nasty issues, particularly a race with the interrupt controller
  in the xilinx driver, together with a couple of more minor fixes and a
  much needed move of the mailing list away from sourceforge."

* tag 'spi-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: hspi: fixup long delay time
  spi: spi-xilinx: Remove ISR race condition
  spi: topcliff-pch: fix error return code in pch_spi_probe()
  spi: topcliff-pch: Pass correct pointer to free_irq()
  spi: Move mailing list to vger
parents 50e6f851 c1d926a5

MAINTAINERS

+1 −1
Original line number Diff line number Diff line
@@ -7624,7 +7624,7 @@ F: drivers/clk/spear/ 
SPI SUBSYSTEM

M:	Mark Brown <broonie@kernel.org>

M:	Grant Likely <grant.likely@linaro.org>

L:	spi-devel-general@lists.sourceforge.net

L:	linux-spi@vger.kernel.org

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git

Q:	http://patchwork.kernel.org/project/spi-devel-general/list/

S:	Maintained

drivers/spi/spi-sh-hspi.c

+1 −1
Original line number Diff line number Diff line
@@ -89,7 +89,7 @@ static int hspi_status_check_timeout(struct hspi_priv *hspi, u32 mask, u32 val) 
		if ((mask & hspi_read(hspi, SPSR)) == val)

			return 0;



		msleep(20);

		udelay(10);

	}



	dev_err(hspi->dev, "timeout\n");

drivers/spi/spi-topcliff-pch.c

+2 −1
Original line number Diff line number Diff line
@@ -1487,7 +1487,7 @@ static int pch_spi_pd_probe(struct platform_device *plat_dev) 
	return 0;



err_spi_register_master:

	free_irq(board_dat->pdev->irq, board_dat);

	free_irq(board_dat->pdev->irq, data);

err_request_irq:

	pch_spi_free_resources(board_dat, data);

err_spi_get_resources:
@@ -1667,6 +1667,7 @@ static int pch_spi_probe(struct pci_dev *pdev, 
		pd_dev = platform_device_alloc("pch-spi", i);

		if (!pd_dev) {

			dev_err(&pdev->dev, "platform_device_alloc failed\n");

			retval = -ENOMEM;

			goto err_platform_device;

		}

		pd_dev_save->pd_save[i] = pd_dev;

drivers/spi/spi-xilinx.c

+35 −39
Original line number Diff line number Diff line
@@ -267,7 +267,6 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) 
{

	struct xilinx_spi *xspi = spi_master_get_devdata(spi->master);

	u32 ipif_ier;

	u16 cr;



	/* We get here with transmitter inhibited */
@@ -276,7 +275,6 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) 
	xspi->remaining_bytes = t->len;

	INIT_COMPLETION(xspi->done);



	xilinx_spi_fill_tx_fifo(xspi);



	/* Enable the transmit empty interrupt, which we use to determine

	 * progress on the transmission.
@@ -285,13 +283,42 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) 
	xspi->write_fn(ipif_ier | XSPI_INTR_TX_EMPTY,

		xspi->regs + XIPIF_V123B_IIER_OFFSET);



	/* Start the transfer by not inhibiting the transmitter any longer */

	for (;;) {

		u16 cr;

		u8 sr;



		xilinx_spi_fill_tx_fifo(xspi);



		/* Start the transfer by not inhibiting the transmitter any

		 * longer

		 */

		cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET) &

							~XSPI_CR_TRANS_INHIBIT;

		xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET);



		wait_for_completion(&xspi->done);



		/* A transmit has just completed. Process received data and

		 * check for more data to transmit. Always inhibit the

		 * transmitter while the Isr refills the transmit register/FIFO,

		 * or make sure it is stopped if we're done.

		 */

		cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET);

		xspi->write_fn(cr | XSPI_CR_TRANS_INHIBIT,

			       xspi->regs + XSPI_CR_OFFSET);



		/* Read out all the data from the Rx FIFO */

		sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET);

		while ((sr & XSPI_SR_RX_EMPTY_MASK) == 0) {

			xspi->rx_fn(xspi);

			sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET);

		}



		/* See if there is more data to send */

		if (!xspi->remaining_bytes > 0)

			break;

	}



	/* Disable the transmit empty interrupt */

	xspi->write_fn(ipif_ier, xspi->regs + XIPIF_V123B_IIER_OFFSET);
@@ -314,39 +341,8 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id) 
	xspi->write_fn(ipif_isr, xspi->regs + XIPIF_V123B_IISR_OFFSET);



	if (ipif_isr & XSPI_INTR_TX_EMPTY) {	/* Transmission completed */

		u16 cr;

		u8 sr;



		/* A transmit has just completed. Process received data and

		 * check for more data to transmit. Always inhibit the

		 * transmitter while the Isr refills the transmit register/FIFO,

		 * or make sure it is stopped if we're done.

		 */

		cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET);

		xspi->write_fn(cr | XSPI_CR_TRANS_INHIBIT,

			xspi->regs + XSPI_CR_OFFSET);



		/* Read out all the data from the Rx FIFO */

		sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET);

		while ((sr & XSPI_SR_RX_EMPTY_MASK) == 0) {

			xspi->rx_fn(xspi);

			sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET);

		}



		/* See if there is more data to send */

		if (xspi->remaining_bytes > 0) {

			xilinx_spi_fill_tx_fifo(xspi);

			/* Start the transfer by not inhibiting the

			 * transmitter any longer

			 */

			xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET);

		} else {

			/* No more data to send.

			 * Indicate the transfer is completed.

			 */

		complete(&xspi->done);

	}

	}



	return IRQ_HANDLED;

}

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