From: Lukas Wunner <lukas@wunner.de> commit e297ddf296de35037fa97f4302782def196d350a upstream. If the call to spi_register_master() fails on probe of the NetUP Universal DVB driver, the spi_master struct is erroneously not freed. Likewise, if spi_new_device() fails, the spi_controller struct is not unregistered. Plug the leaks. While at it, fix an ordering issue in netup_spi_release() wherein spi_unregister_master() is called after fiddling with the IRQ control register. The correct order is to call spi_unregister_master() *before* this teardown step because bus accesses may still be ongoing until that function returns. Fixes: 52b1eaf4c59a ("[media] netup_unidvb: NetUP Universal DVB-S/S2/T/T2/C PCI-E card driver") Signed-off-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Cc: <stable@vger.kernel.org> # v4.3+: 5e844cc37a5c: spi: Introduce device-managed SPI controller allocation Cc: <stable@vger.kernel.org> # v4.3+ Cc: Kozlov Sergey <serjk@netup.ru> Link: https://lore.kernel.org/r/c4c24f333fc7840f4a3db24789e6e10dd660bede.160728688... Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/media/pci/netup_unidvb/netup_unidvb_spi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c b/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c index f33c0de3e849..019bbc18cede 100644 --- a/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c +++ b/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c @@ -184,7 +184,7 @@ int netup_spi_init(struct netup_unidvb_dev *ndev) struct spi_master *master; struct netup_spi *nspi; - master = spi_alloc_master(&ndev->pci_dev->dev, + master = devm_spi_alloc_master(&ndev->pci_dev->dev, sizeof(struct netup_spi)); if (!master) { dev_err(&ndev->pci_dev->dev, @@ -217,6 +217,7 @@ int netup_spi_init(struct netup_unidvb_dev *ndev) ndev->pci_slot, ndev->pci_func); if (!spi_new_device(master, &netup_spi_board)) { + spi_unregister_master(master); ndev->spi = NULL; dev_err(&ndev->pci_dev->dev, "%s(): unable to create SPI device\n", __func__); @@ -235,13 +236,13 @@ void netup_spi_release(struct netup_unidvb_dev *ndev) if (!spi) return; + spi_unregister_master(spi->master); spin_lock_irqsave(&spi->lock, flags); reg = readw(&spi->regs->control_stat); writew(reg | NETUP_SPI_CTRL_IRQ, &spi->regs->control_stat); reg = readw(&spi->regs->control_stat); writew(reg & ~NETUP_SPI_CTRL_IMASK, &spi->regs->control_stat); spin_unlock_irqrestore(&spi->lock, flags); - spi_unregister_master(spi->master); ndev->spi = NULL; } -- 2.25.1