lkml.org 
[lkml]   [2022]   [Feb]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v3 11/30] s390/pci: add helper function to find device by handle
    Date
    Intercepted zPCI instructions will specify the desired function via a
    function handle. Add a routine to find the device with the specified
    handle.

    Acked-by: Niklas Schnelle <schnelle@linux.ibm.com>
    Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
    Reviewed-by: Eric Farman <farman@linux.ibm.com>
    Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
    Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
    ---
    arch/s390/include/asm/pci.h | 1 +
    arch/s390/pci/pci.c | 16 ++++++++++++++++
    2 files changed, 17 insertions(+)

    diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
    index 7ee52a70a96f..3c0b9986dcdc 100644
    --- a/arch/s390/include/asm/pci.h
    +++ b/arch/s390/include/asm/pci.h
    @@ -275,6 +275,7 @@ static inline struct zpci_dev *to_zpci_dev(struct device *dev)
    }

    struct zpci_dev *get_zdev_by_fid(u32);
    +struct zpci_dev *get_zdev_by_fh(u32 fh);

    /* DMA */
    int zpci_dma_init(void);
    diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
    index ca9c29386de6..04c16312ad54 100644
    --- a/arch/s390/pci/pci.c
    +++ b/arch/s390/pci/pci.c
    @@ -76,6 +76,22 @@ struct zpci_dev *get_zdev_by_fid(u32 fid)
    return zdev;
    }

    +struct zpci_dev *get_zdev_by_fh(u32 fh)
    +{
    + struct zpci_dev *tmp, *zdev = NULL;
    +
    + spin_lock(&zpci_list_lock);
    + list_for_each_entry(tmp, &zpci_list, entry) {
    + if (tmp->fh == fh) {
    + zdev = tmp;
    + break;
    + }
    + }
    + spin_unlock(&zpci_list_lock);
    + return zdev;
    +}
    +EXPORT_SYMBOL_GPL(get_zdev_by_fh);
    +
    void zpci_remove_reserved_devices(void)
    {
    struct zpci_dev *tmp, *zdev;
    --
    2.27.0
    \
     
     \ /
      Last update: 2022-02-04 22:17    [W:3.897 / U:1.300 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site